I like the current setup! Like it has already been said, just let it grow in and it will be REALLY GOOD!!!! The Hitch Hiker is a MTS (Malaysian Trumpet Snail), and I like them where other don't! They are a live bearing snail, and can quickly reproduce in a aquarium! They do a GREAT JOB stirring up the substrate and cleaning it as well, but the can OVERPOPULATE too! So if you don't want them in there, take it out ASAP, but being that you have seen it for 3 months I would bet there are already baby MTS and you should start seeing them pretty quick! If they do populate too much for your taste you can sell them in the Swap n Shop, or get a dwarf loach and they can usually take care of them for Ya. Also Assassin Snails will kill them too!
Anyway keep up the great work, and pics too! I can't wait to see it fill in!